Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47492e6fca9a79f…

MALICIOUS

PDF

66.6 KB Created: 2021-03-05 07:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 332906d2dcbb606db9ba90d9c73acdb0 SHA-1: f065a85571357e3d04f332a9c70c57c2b12dedee SHA-256: f47492e6fca9a79f17d6801842342c92a1b1d08621057435287306f64c0c1ff6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the URI and the phishing detection suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wix?keyword=hacked+the+world%2527s+hardest+game
    • https://cdn-cms.f-static.net/uploads/4459328/normal_5fd91e4420065.pdf
    • http://zoguponuwuxoli.medianewsonline.com/22144518072.pdf
    • https://cdn-cms.f-static.net/uploads/4482418/normal_5fd8faa7798db.pdf
    • http://gagitevanonuti.mywebcommunity.org/ralph_p_grimaldi_discrete_and_combinatorial_mathematics_5th_edition_download.pdf
    • http://pefiworawodud.mypressonline.com/11775731994.pdf
    • http://mamefumiwuto.mywebcommunity.org/jepuzonedag.pdf
    • https://cdn-cms.f-static.net/uploads/4488842/normal_60237652c3622.pdf
    • https://static.s123-cdn-static.com/uploads/4377116/normal_5fce87f9cb0a4.pdf
    • https://cdn-cms.f-static.net/uploads/4485299/normal_600fa48090d9c.pdf
    • http://pivolirarorip.mypressonline.com/how_to_use_google_my_maps_in_the_classroom.pdf
    • http://bumululoru.mywebcommunity.org/how_to_learn_korean_online_reddit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a06dc294-f646-46e6-8baf-3ec6681fafe0/26_roadmaster_granite_peak_womens_bike_weight_limit.pdf
    • http://roveramo.atwebpages.com/wildgame_innovations_terra_extreme_12mp_camera_wgicm0628.pdf
    • http://nafaradevofipaf.myartsonline.com/13895354719.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/fenamavusizofamona.pdf
    • https://s3.amazonaws.com/pasutiz/creative_certificate_template_psd_free.pdf
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_ad1445421ee44c3ca38f7eeae98e9c9b.pdf?index=true
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_82bf49a61bd84dc4be01897a36915f11.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c727.bin
043e10193f09d2d9d3a1791ab87e2a8dd29b7c2a728ef036bfbdd91582cd17a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC727 5504 bytes
font_01_sfnt_off0000d9cd.bin
96224c600ce162ead6f3583e2c6db71e75286a814417776527186a029e7327b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 10328 bytes